ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • QUALITY ASSURANCE AND RELIABILITY  (3)
  • 1975-1979  (3)
  • 1970-1974
  • 1
    facet.materialart.
    Unknown
    Evaluation of a composite mobile holographic nondestructive test system (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A simplified theoretical model for the interpretation of the double-exposure holographic interference fringe loci due to the general three-dimensional displacements was derived for the specific composite mobile holographic nondestructive test system. The model, representing a good approximation to a more tedious theoretical result, predicts that a combination of in-plane and out-of-plane displacements of the surface will produce concentric circular-shaped fringe patterns with locations of their center affected by the displacements. Appropriate experiments were designed and carried out for the test of the validity of the theory. These experiments include the taking of double-exposure holograms of in-plane translations and combined in-plane and out-of-plane translations. The simplified model agreed quite well with the experimental results. Experimentally observed effects due to the curvature of the test plate and the variations of the angles of incidence of the laser light suggest that in order for the simplified model to be able to predict the test results more accurately, incidence and reflection of the laser light should be chosen as nearly perpendicular to the surface of the tested object as possible.
    Keywords: QUALITY ASSURANCE AND RELIABILITY
    Type: NASA-CR-144349 , BER-204-74
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 2
    facet.materialart.
    Unknown
    Practical quantitative fringe interpretation in a composite mobile holographic nondestructive test system (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A simplified theoretical model for the interpretation of the double-exposure holographic interference fringe loci due to the general three-dimensional displacements has been derived for the specific composite mobile holographic nondestructive test system. The model, representing a good approximation to a more tedious theoretical result, predicts that a combination of in-plane and out-of-plane displacements of the surface will produce concentric circular-shaped fringe patterns.
    Keywords: QUALITY ASSURANCE AND RELIABILITY
    Type: Seminar on Practical applications of low power lasers; Aug 26, 1976 - Aug 27, 1976; San Diego, CA
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 3
    facet.materialart.
    Unknown
    Electric current heating calibration of a laser holographic nondestructive test system (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Holographic NDT was used to measure small surface displacements controlled by electric heating by detecting the difference of the interference fringe patterns as viewed through the hologram on a real time basis. A perforated aluminum test plate, with the holes used to position thin metal foils, was used in the experiment. One of the foils was connected to an electric power source and small displacements of the foil were caused and controlled by Ohmic heating. An He-Ne laser was used to perform the holography.
    Keywords: QUALITY ASSURANCE AND RELIABILITY
    Type: Electricity: An expanding technology; Apr 06, 1975 - Apr 09, 1975; Charlotte, NC
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...